lint/lint-stable-004-style-labels: Update script

- Look at entire tree instead of just the current commit.  This was
causing the test to overlook some issues that were already in the tree.
- If git is on the system, and the code is in a git repo, use the
'git ls-files' command to find the files to examine.  If those
conditions aren't met, fall back to using the find command.
- Wrap the command so it's easier to read.

Change-Id: I3dce219a29ffb1ae56a31318b995e3ba8ea43e70
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14194
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

0 files changed, 0 insertions, 0 deletions